{"id":10799,"date":"2022-10-28T06:40:27","date_gmt":"2022-10-27T22:40:27","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=10799"},"modified":"2022-10-28T06:40:27","modified_gmt":"2022-10-27T22:40:27","slug":"zou-yiquan-team-published-research-in-european-journal-of-medicinal-chemistry-in-2013-37622-90-5","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=10799","title":{"rendered":"Zou, Yiquan team published research in European Journal of Medicinal Chemistry  in 2013 | 37622-90-5"},"content":{"rendered":"<p>Pyrazoles are synthesized by the reaction of \u03b1,\u03b2-unsaturated aldehydes with hydrazine and subsequent dehydrogenation. 37622-90-5, formula is C6H8N2O2, Name is  Ethyl 4-pyrazolecarboxylate. Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). For example, acetylacetone and hydrazine gives 3,5-dimethylpyrazole. <a href=\"https:\/\/www.ambeed.com\/products\/37622-90-5.html\">HPLC of Formula: 37622-90-5<\/a>.<\/p>\n<p>Zou, Yiquan;Xu, Lei;Chen, Wuyan;Zhu, Yiping;Chen, Tiantian;Fu, Yan;Li, Li;Ma, Lanping;Xiong, Bing;Wang, Xin;Li, Jian;He, Jianhua;Zhang, Haiyan;Xu, Yechun;Li, Jia;Shen, Jingkang research published \u300a Discovery of pyrazole as C-terminus of selective BACE1 inhibitors\u300b, the research content is summarized as follows. We recently discovered and reported dual inhibitor 5 of AChE and BACE1 with N-benzylpiperidine Et as C-terminus. Compound 5 showed potent inhibitory activities for BACE1, and could reduce endogenous A\u03b2<sub>1-40<\/sub> production in APP transgenic mice. In present work, we rapidly identified substituted triazole as the C-terminus of compound 5 by replacing the benzylpiperidine Et group with click chem. and tested these synthesized compounds by in situ screening assay. As revealed by the crystal structures of BACE1 in complex with our triazole compound 12, we found that Pro70 and Thr72 located in the flap region were the critical components for binding with these inhibitors. With the aid of the crystal structure, a new series of five-membered heterocyclic compounds was prepared in order to explore the structure-activity relationship (SAR) of this class of mols. From these efforts, pyrazole was discovered as a novel C-terminus of BACE1 inhibitors. After further modification of pyrazole with variable substituents, compound 37 exhibited good potency in enzyme inhibition assay (IC<sub>50<\/sub> = 0.025 \u03bcM) and compound 33 showed moderate inhibition effects on A\u03b2 production of APP transfected HEK293 cells. Moreover, these pyrazole derivatives demonstrated good selectivity vs. cathepsin D. Our results indicated that the vicinity of Pro70 and Thr72 might be utilized as a subsite, and the discovered pyrazole derivatives might provide useful hints for developing novel BACE1 inhibitors as anti-AD drugs.<\/p>\n<p><a href=\"https:\/\/www.ambeed.com\/products\/37622-90-5.html\">HPLC of Formula: 37622-90-5<\/a>, Ethyl 4-pyrazolecarboxylate, also known as Ethyl pyrazole-4-carboxylate, is a useful research compound. Its molecular formula is C6H8N2O2 and its molecular weight is 140.14 g\/mol. The purity is usually 95%.<\/p>\n<p>Ethyl pyrazole-4-carboxylate is a low yield, transition metal salt that is used in the synthesis of pyrazoles. It can be synthesized by the reaction of sodium ethoxide with ethyl chloroformate and a Grignard reagent. Sodium ethoxide is added to a suspension of sodium chloride and dried ethyl chloroformate, followed by addition of magnesium turnings. The mixture is refluxed for one hour, cooled, and filtered to give crystals. Ethyl pyrazole-4-carboxylate is used in the preparation of ethyl esters from aliphatic alcohols by reacting with boron trichloride or phosphorus pentachloride. It participates in certain chemical reactions as a byproduct and can damage equipment during chemical reactions. The yield of this compound can be increased by using an excess amount of Grignard reagent or adding hexamethylenetetramine to the reaction mixture, 37622-90-5.<\/p>\n<p>Referemce:<br \/><a href=\"https:\/\/en.wikipedia.org\/wiki\/Pyrazole\">Pyrazole &#8211; Wikipedia<\/a>,<br \/><a href=\"https:\/\/www.sciencedirect.com\/topics\/chemistry\/pyrazoles\">Pyrazoles &#8211; an overview | ScienceDirect Topics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"https:\/\/www.ambeed.com\/products\/37622-90-5.html\">HPLC of Formula: 37622-90-5<\/a>, Ethyl 4-pyrazolecarboxylate, also known as Ethyl pyrazole-4-carboxylate, is a useful research compound. Its molecular formula is C6H8N2O2 and its molecular weight is 140.14 g\/mol. The purity is usually 95%.<\/p>\n<p>Ethyl pyrazole-4-carboxylate is a low yield, transition metal salt that is used in the synthesis of pyrazoles. It can be synthesized by the reaction of sodium ethoxide with ethyl chloroformate and a Grignard reagent. Sodium ethoxide is added to a suspension of sodium chloride and dried ethyl chloroformate, followed by addition of magnesium turnings. The mixture is refluxed for one hour, cooled, and filtered to give crystals. Ethyl pyrazole-4-carboxylate is used in the preparation of ethyl esters from aliphatic alcohols by reacting with boron trichloride or phosphorus pentachloride. It participates in certain chemical reactions as a byproduct and can damage equipment during chemical reactions. The yield of this compound can be increased by using an excess amount of Grignard reagent or adding hexamethylenetetramine to the reaction mixture, 37622-90-5.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[218,131],"tags":[732],"class_list":["post-10799","post","type-post","status-publish","format-standard","hentry","category-37622-90-5","category-pyrazoles-derivatives","tag-m-w100-150"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Zou, Yiquan team published research in European Journal of Medicinal Chemistry in 2013 | 37622-90-5 | pyrazoles-derivatives<\/title>\n<meta name=\"description\" content=\"Pyrazoles are synthesized by the reaction of \u03b1,\u03b2-unsaturated aldehydes with hydrazine and subsequent dehydrogenation. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). For example, acetylacetone and hydrazine gives 3,5-dimethylpyrazole. HPLC of Formula: 37622-90-5.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pyrazoles-derivatives.com\/?p=10799\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Zou, Yiquan team published research in European Journal of Medicinal Chemistry in 2013 | 37622-90-5 | pyrazoles-derivatives\" \/>\n<meta property=\"og:description\" content=\"Pyrazoles are synthesized by the reaction of \u03b1,\u03b2-unsaturated aldehydes with hydrazine and subsequent dehydrogenation. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). For example, acetylacetone and hydrazine gives 3,5-dimethylpyrazole. 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Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). For example, acetylacetone and hydrazine gives 3,5-dimethylpyrazole. 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Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). For example, acetylacetone and hydrazine gives 3,5-dimethylpyrazole. HPLC of Formula: 37622-90-5.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.pyrazoles-derivatives.com\/?p=10799","og_locale":"en_US","og_type":"article","og_title":"Zou, Yiquan team published research in European Journal of Medicinal Chemistry in 2013 | 37622-90-5 | pyrazoles-derivatives","og_description":"Pyrazoles are synthesized by the reaction of \u03b1,\u03b2-unsaturated aldehydes with hydrazine and subsequent dehydrogenation. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). 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